Mount Morris is a village in the town of Mount Morris in Livingston County, New York, United States. The village population was 2,986 at the 2010 census, out of 4,465 in the entire town. The village and town are named after Robert Morris.

The Phelps and Gorham Purchase was the forced sale, in 1788, of a portion of a large tract of land in western New York State owned by the Seneca nation of the Iroquois Confederacy to a syndicate of land developers led by Oliver Phelps and Nathaniel Gorham. The larger tract of land is generally known as the "Genesee tract" and roughly encompasses all that portion of New York State west of Seneca Lake, consisting of about 6,000,000 acres (24,000 km2).